Cylinder for light engines



A. H. R. FEDDEN- AND L. F. G. BUTLER.

CYLINDER FOR LIGHT ENGINES.

APPLICATIQN FILED. JUNE 2, 1920.

'1 ,360,9()9, Patented Nov. 30, 1920.

2 SHEETS-SHEET l- A. H. R. FEDDEN AND L. F. G. BUTLER.

CYLINDER FOR LIGHT ENGINES. APPLICATION FILED JUNE 2.1921).

1,360,909, PatentedN 0,1920.

2 SHE HEE M6 aw- UNITED STATES PATENT orricE.

ALFRED HUBERT ROY FEDDEN AND LEONARD FREDERICK GEORGE BUTLER, OFBRISTOL, ENGLAND, ASSIGNORS OF ONE-THIRD TO THE COSMOS ENGINEERINGCOMPANY LIMITED, 0F BRISTOL, ENGLAND.

CYLINDER FOR LIGHT enemas.

Specification of Letters Patent.

Patented Nov. 30, 1920.

Application filed June 2, 1920. Serial No. 385,958.

T 0 all 20 71.0721. it may concern:

Be it known that we, ALFRED HUBERT Ro'r :F'soDEN and LEONARD FREDERICKGEORGE BUTLER, both subjects of the King Engines, of which the followingis a specification.

This invention relates to an improved construction of cylinder and headfor a light engine such for example as an internal-combustion engine. Ithas for its object to provide means'whereby a cast-on head may be moresecurelyheld to the parts on to which it is cast.

The invention is particularly suitable in its application to anair-cooled cylinder of which the cast-on head is formed of a metal ofhigh heat conductivity, such for example as aluminium.

According to the invention, a cylinderhead is cast on to a part (forexample a cylinder or a valve-seating) and is characterizedby the saidpart having a flanged peripheral rib, for example a rib of T-shapedcross section, interrupted or otherwise, which rib is carried on asurface of the part which is covered by the casting.

The invention also includes a cylinder or a valve-seating having aflanged peripheral rib, interrupted or otherwise, to be emtrated, acylinder A provided with coolingfins A has its upper end a portion Afree from cooling-fins but having a pcripheral rib B formed integralwith it. This rib extends outwardly from the portion A is of T-sectionas shown and is preferably turned from the solid. At intervals aroundthe rib B are orifices B in the web thereof. Valve-seatings C are alsoformed with ribs 0 similar to the ribs B and the ribs 0 have orifices Cat intervals around them in a similar manner to the ribs B. A head D ofmaterial having good thermal conductivity, preferabl alunnnium, is caston to the cylinder and valve-seatings C so that the metal of the headcovers or embraces the ribs B and C and interlocks with them. Theorifices B and C permit of the escape of air from the channels formed bythe ribs when the head is being cast on.

The said T-section rib may extend entirely around the periphery of thecylinder or valve seating or other part of which it is formed, or it maybe divided into sections separated by-gaps of any desired length. 7

An advantage of the present construction is that in addition to the ribsB and 0 constituting a means whereby a cast-on head is retained in firmcontact with the parts on v to which it is cast, the head is freed fromencumbrance of any form of retaining de-' vice, such as studs or bolts.

Also a considerable latitude as to the position of the sparking plug ispossible, and if it is inserted through the side of the head, as itwould be in a cylinder of thev type illustrated inthe accompanyingdrawings, there is no necessity to boss up the metal'as'there isadequate thickness already provided in the head. The machining is"thereby facilitated.

Although one particular form of the invention has been described indetail, the invention is not limited to those details and it will bereadil understood that the invention'is applica le to an engine of thesleevevalve type in which separate valve-seats are not required. I

Moreover, the invention is not limited to internal-combustion enginesbut is applicable to any cases where a cast-on head is desired.

What we claim as our invention and desire to secure by Letters Patentis 1. In an engme-cylinder, the combination of a part having a flangedperipheral rib, and afcylindr-head cast on said part and interlockingwith said rib.

2. In an engine-cylinder, the combination 105 of a part having aninterrupted flanged peripheral rib, and a cylinder head cast on saidpart and interlocking with the said ml).

3. In an engine-cylinder, the combination of a part having a perforatedflanged peripheral rib, and a cylinder head cast on said part andinterlocking with said rib.

4. In an engine-cylinder the combination of a part having asectionalized and perforated flanged peripheral rib, and a cylinder-headcast on said part and interlocking with said rib.

5. In an engine-cylinder, the combination of a cylinder-barrel having atone of its ends a flanged peripheral rib, and a cylinderhead cast onsaid barrel and interlocking with said rib.

6. In an engine-cylinder, the combination of .a cylinder-barrel, havingat one of its ends a sectionalized and perforated flanged peripheral riband a cylinder-head cast on said part and interlocking with said rib.

7. In an engine-cylinder, the combination of a cylinder-barrel having atone of its ends a flanged peripheral rib, a valve-seating having afianged peripheral rib, and a cylinderhead cast on to said barrel, andon to said valve-seating, and interlocking with the said ribs on them.

8. In an internal-combustion engine cylinder, the combination of acylinder barrel having radiating fins on its curved surface and acircumferential rib of T-seetion perforated in its web, near one end ofsaid barrel, a valve-seating havin a circumferential rib of T-sectionper orated in its web, and a cylinder-head cast on to said barrel andsaid valve-seating and interlocking with the said T-section-ribsthereon.

In testimony whereof we have signed our names to this'specification inthe presence of two subscribing witnesses.

ALFRED HUBERT ROY FEDDEN. LEONARD FREDERICK GEORGE BUTLER. Witnesses:

N. LUKE, H. M. VINCENT.

